#app {
    width: 500px;
    margin: 20px auto;
    padding: 20px;
    box-sizing: border-box;
    border-radius: 4px;
    border: 1px solid #ebeef5;
    background-color: #fff;
    box-shadow: 0 2px 12px 0 rgba(0,0,0,.1);
    color: #303133;
    transition: .3s;
}

#app input {
    width: 100%;
    background-color: #fff;
    border-radius: 4px;
    border: 1px solid #dcdfe6;
    box-sizing: border-box;
    color: #606266;
    display: inline-block;
    font-size: inherit;
    height: 40px;
    line-height: 40px;
    outline: none;
    padding: 0 15px;
    transition: border-color .2s cubic-bezier(.645,.045,.355,1);
}